ifeq ($(yt_srctree),)
# 上面两层
yt_srctree := $(patsubst %/,%,$(dir $(CURDIR)))
yt_srctree := $(patsubst %/,%,$(dir $(yt_srctree)))
endif

BPF_BUILF_CONFIG_FILE ?= $(yt_srctree)/hacks/yt_build_bpf_yocto_v1.mk
include ${BPF_BUILF_CONFIG_FILE}


all: build
	echo ${CROSS_COMPILE}
	echo $^
	echo $<


build:
	echo $@